Caulking gun



ATTORNEYS This invention relates to caulking guns and is acontinuation-in-part of the invention disclosed and claimed in my U. S.Patent No. 2,720,345, tiled November 12, 1952, Serial No. 320,051, andentitled Caulking Gun.

It is a primary object of this invention to provide an improved supportmember in a caulking gun for receiving therein a caulk magazine.

A further object of this invention is to provide a caulking supportmember in a caulking gun together with novel means for releasablysecuring caulking magazine therein.

Other objects and advantages will become apparent in the followingspecificati-on when considered in the light of the attached drawings, inwhich:

Figure 1 is a side elevational view, partly in cross section, taken onthe line 1-1 of Figure 2, looking in the direction of the arrows;

Figure 2 is an end elevational view taken on the vertical plane of line2-2 of Figure l, looking in the direction of the arrows; and,

Figure 3 is an enlarged, detailed fragmentary bottom plan view lof theinner end of the magazine support member.

Figure 4 is a sectional view taken on the line 4-4 of Figure 3.

Referring now to the drawings in detail wherein like reference numeralsindicate like parts throughout the several figures, the referencenumeral designates, in general, a caulking compound magazine ofconventional construction. The magazine 10 includes a cylindrical wall12 having closed end walls 14 and 16 at each end, respectively, thereof.A nozzle 18 of tapering configuration is carried by a cap 20 having anannular flange 22 which telescopes over the outer end of the magazine10. The outer end wall 14 is provided with a closure ap 24 which uponpressure being applied to the caulking compound from the other end ofthe magazine 10 is adapted to be forced outwardly into the inner or rearend Iof the nozzle 18. Thus an opening 26 is formed in the end wall 14which permits passage therethrough of the caulking compound 28 into thenozzle 18.

The above described magazine 10 is of conventional construction and, perse, forms no part of the present invention.

The instant invention is directed to the caulking gun generallydesignated at 30, and more specifically to the magazine support member32. The gun 30 includes a handle 34 on which is pivotally mounted alever 36 for actuation of a ratchet pawl 38. A holding pawl 39 ismounted in the handle 34 forwardly of the pawl 38. The upper forward endof the handle member 34 is open and the opposite sides thereof 40, 41are provided with a plurality `of tabs 42 which project forwardlythrough openings 43 formed in the cylindrical inner end wall 44. Thetabs are bent laterally to fixedly secure the inner end wall 44 to thehandle 34, and the inner end wall 44 has centrally formed therein anopening 46.

An elongated arcuately shaped magazine support bar 48 is integrallyconnected with the lower side of the inner 2,801,775 Patented Aug.1 6

2 end wall 44` and projects forwardly therefrom and terminates -in anintegrally formed substantially cylindrical outer end wall 50 disposedin spaced confronting rela` tion relative to the inner end wall 44. Theouter end wall 50 is `provided with a curvilinear slot 52 which extendsinwardly from an upper circumferential edge portion and terminates inthe central body portion thereof. Fora purpose to be described, thewidth Iof the slot 52 diminishes as the slot extends to the center ofthe end wall 50.

The lower side lof the bar 48 is formed with an elongated axially andforwardly extending struck tine 54 adjacent the inner wall 44, and thegun is completed by loosely inserting one end of a plunger rod 56 havingratchet teeth 58 on a side thereof and into the upper end of the handle34 through the opening 46. The opening 46 is suhciently large enough soas to permit the plunger rod to rotate 360 about its longitudinal axis.The other end of the plunger rod 56 has iixedly secured thereto asubstantially cylindrical plunger 60.

As is seen in Figure l, the inner end of the plunger rod 56 has theratchet teeth normally engaging the pawls 38, 39 when the gun 30 is inits operative condition, and the extreme inner end of the plunger rodextends loosely through an opening 62 formed in the rear wall 64 of thehandle 34 and is bent laterally to form a manually operable lever 66.

The exact details of the construction of the operating ratchet pawls 38and 39, and of the plunger rod 56 are set forth in detail in my UnitedStates Patent No. 2,720,345, tiled November 12, 1952, Serial No.320,051, and entitled Caulking Gun.

In operation, and referring speciiically to Figure 1 of the drawing, theoperator grasps the lever 66 and rotates it substantially in eitherdirection to disengage the pawls 38, 39 from the ratchet teeth 58. Thelever 66 is then pulled away from the handle 34 to retract the plunger60 from its shown position to a point proximate the inner wall 44.Thereafter the spent magazine 10 is removed. A new magazine 10 is placedon the support member 32 with the inner end thereof engaging under thetine 54 and the inner end of the nozzle 18 engaging within the slot 52.The nozzle 18 is then forced into the slot 52 to wedge therein at theinner terminal end thereof whereby the magazine becomes firmly locked onthe support member 48. The lever 66 is then rotated 180 to reengage theteeth 58 with the pawls 38, 39.

The operator then operates the lever 36 causing the pawl 38 to advancethe piston rod 56 so that the piston 60 engages the inner end wall 16-of the magazine 10. Continued operation of the lever 36 effectsdetachment of the inner end wall 16 from the cylindrical wall 12 andexerts a force on the caulking compound 28, and this force, in turn isapplied to the flap 24 causing it to open whereby the caulking compoundenters and is discharged from the nozzle 18.

Having thus described the preferred embodiments lof the invention, itshould be understood that numerous modifications and structuraladaptations may be resorted to without departing from the scope of theappended claims.

What is claimed is:

1. A caulking gun comprising a handle member, a plunger advancing leverrod pivotally carried by said handle member, a pawl driven by saidplunger advancing lever, a plunger rod provided with ratchet teeth alonga longitudinal extending side thereof, said pawl being` adapted toengage said ratchet teeth to drive said plunger rod in one direction,said plunger rod being provided with an enlarged piston at one endthereof, the other end of said plunger rod being provided with alaterally extended handle, a supporting member for a cylindricalcaulking magazine having an end wall at one end thereof and a nozzlemounted on its other end, said supporting member comprising an elongatedarcuately shaped support bar having integrally formed opposed circularend Walls, one of said end Walls having an aperture formed therein toreceive said plunger rod for rotation and reciprocation therethrough,means for securing said one end Wall to said handle member, said othercircular end wall having a curvilinear slot formed therein diminishinginwardly in width to receive and Wedge therein the inner end of saidnozzle, and means on said supporting member detachably securing said oneend of said magazine thereto.

2. caulking gun as dened in claim 1, and said means comprlsing anupwardly and forwardly extending struck tine.

References Cited in the file of this patent UNITED STATES PATENTS l s eI

